An experimental initiative in Natore has led to the development of a bio fish feed that could significantly reduce fish farming costs while ensuring safety for human health, say researchers involved in the project.
Developed by biologist Dr GNM Elias, the innovative feed is made from protein-rich Black Soldier Fly (BSF) larvae, combined with mustard oil cake, molasses and a fungus called Trichoderma.
The ingredients are locally sourced, making the feed not only cost-effective but also environmentally friendly.
Dr Elias told UNB that after years of research, he devised this organic formula by rearing BSF larvae on discarded vegetables like eggplants.
The larvae consume the waste, reproduce and die, leaving behind eggs rich in protein and vitamins that fish find highly nutritious.
“The feed is completely safe and healthy for human consumption,” said Dr Elias, adding that it also improves water quality and enhances ecological balance in fish ponds.
In trial applications, the feed has shown promising results by boosting plankton growth—the natural food source for fish—while also supporting the organic matter needed for duck farming in the same ecosystem.
To enhance the feed's nutritional value and sustainability, Dr Elias used sugar mill byproducts and refined the Trichoderma fungus through research support in Malaysia.
According to him, the formula releases nutrients in phases, contributing to the steady growth of fish and maintaining the natural equilibrium of the water body.
Local farmers who participated in the trial are encouraged by the outcome.
Shafiul Haque, a fish farmer in the region, described the innovation as “timely and promising” and said commercial production could make aquaculture more cost-effective and sustainable.
Another farmer, Mehedi Hasan, said their ponds have shown encouraging results using the feed and urged authorities to take steps towards its large-scale production.
Dr Elias previously focused on applying Trichoderma in organic fertilisers, which proved effective in potato and other root crop farming.
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By blending poultry litter and sugar mill press mud with Trichoderma, he created a bio-fertiliser that increased yields by nearly 30% in northern Bangladesh.
This year, farmers in the region have reported strong harvests of potatoes and onions using the organic mix.
